L6228QTR STMicroelectronics, L6228QTR Datasheet - Page 27

• Manufacturer Part Number: L6228QTR
• Description: IC DVR BIPO STEP MOTOR 32-VFQFPN
• Manufacturer: STMicroelectronics
• Type: Bipolar Stepper Motor Driverr

Specifications of L6228QTR

• Applications: Stepper Motor Driver
• Number Of Outputs: 1
• Current - Output: 1.4A
• Voltage - Supply: 8 V ~ 52 V
• Operating Temperature: -25°C ~ 125°C
• Mounting Type: Surface Mount
• Package / Case: 32-VFQFN, 32-VFQFPN
• Product: Stepper Motor Controllers / Drivers
• Operating Supply Voltage: 48 V
• For Use With: 497-6818 - EVAL BOARD FOR L6228Q
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Voltage - Load: -
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant
• Other names: 497-6864-2; L6228QTR

L6228Q
7
Thermal management
In most applications the power dissipation in the IC is the main factor that sets the maximum
current that can be delivered by the device in a safe operating condition. Therefore, it has to
be taken into account very carefully. Besides the available space on the PCB, the right
package should be chosen considering the power dissipation. Heat sinking can be achieved
using copper on the PCB with proper area and thickness.
For instance, using a VFQFPN32L 5x5 package the typical Rth(JA) is about 42 °C/W when
mounted on a double-layer FR4 PCB with a dissipating copper surface of 0.5 cm
side plus 6 cm
2
ground layer connected through 18 via holes (9 below the IC).
Doc ID 14321 Rev 4
Thermal management
2
on the top
27/32